I have this arrow and has been trying to get VIP. It's the sole reason I have gotten there. I spend alot of time grinding away on this game and is looking forward to getting that vip status. I guess I will keep grinding on. Hopefully I nail it soon.
I have considered this myself BUT even in my active club, it's an absolute grind to get to platinum from gold. We are on the last level before moving up from gold and it's such a drag. We are working hard at it and donating as quick as they come in.
I have never paid any attention to the shakes or formulas out there on these boxes. I just hit them as soon as they appear. Had what I consider great success to this point.